Rook deill



(No Model.) 4 Sheets-Sheet 1.

A. I PARSONS. 1100K DRILL.

Patented June 2, 1885. 5

PETERS, FhnloLilhngnphcr. nnnnnnnnn I11.

(No Model.)

' 4 Sheets-Sheet 2. A. LPARSONS,

ROCK DRILL. No. 319,308. Patented June 2,1885.

B fi lillli i'inm h'ln O WITNESSES l/VI/EIVTOR;

N. clo-Lhhcgnphor. washnman. n c

4 Sheets-Sheet 3.

(No Model.)

ROCK DRILL.

Patented June 2, 1885.

A. I. PARSONS.

WITNESSES (No Model.) 4 Sheets-Sheet 4.

A. I. PARSONS.

ROGK DRILL. No. 319,308. Patented June. 2, 1885.

N. PETERS. Pholo-Lilhognphcr, Wnhinglun. n. c

WITNESSES 06 WW4 Unr'rnio drains a'rnar rrrnn.

A. INGRAM PARSONS, OF NEW YORK, N. Y.

ROCK=DRiLL SPECIFICATION forming part of Letters Patent No. 319,308,dated June 2, 1885.

Application filed December 26, 1883. (No model.)

To all whom it may concern:

Be it known that I, A. INGRAM Pnnsonsa citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Rock-Drills, ofwhich the following is a full, clear, and exact description.

This invention is in the nature of improvements in hand-powerrock-drills; and the improvements relate to the means for imparting thecompound reciprocating and rotary motion to the drill-spindle necessaryto give the tool the proper entrance and clearance of the hole; also, tothe operating mechanism, and also to the means for feeding the drillingmechanism as the work progresses.

The invention consists in the mechanisms and combinations of mechanisms,as hereinafter particularly set forth and claimed.

In the accompanying drawings, illustrating my invention, in the severalfigures of which like parts are similarly designated,Fig'ure l is a topplan view of my rock-drill, one of the handle-sockets being in sectionto show its spring. Fig. 2 is an elevation of .the near or lower side ofFig. 1, some parts being broken away to show others, the parts being inposition just after the delivery of the blow by the hammer. Fig. 8 is anelevation of the far or upper side of Fig. 1, some parts also beingbroken away to expose others, the parts being in the position assumedimmediately preceding the delivery of the blow. Fig. 4 is a plan view ofthe cam and its shaft, showing in horizontal section the mechanicalmovement employed in converting the reciprocating motion of theoperating-handles into rotary motion of the cam-shaft and its connectedparts. Fig. 5 is a vertical section on the plane of the line 00 x ofFig. 2, looking in the direction of the arrow in said figure. Fig. 6 isa horizontal section on the plane of the line 3 y, Fig. 5, looking inthe direction of the arrow in said figure. Fig. 7 is aperspective view011 a larger scale of the worm, pawl, and ratchet, and connection withthe spindle for use in connection with the mechanism for automaticallyfeeding the drill. Fig. 8 is a partly sectional elevation on the samescale of the clutch and worm for use in rotating the spindle andmanually feeding the drill. Fig. 9 shows face views of the clutch, andFig. 10 is a cross-section of part of the mechanism for converting thereciprocating motion of the handles into rotary motion.

The drill-frame consists of parallel bars, preferably tubes a a,connected at their ends by yokes a o the yoke a, at the front of themachine, extending below the plane of the drill-tool, and having thesupporting screwspur afland the yoke o arching above the bars to providefor the arc of travel of the hammer. These yokes, furthermore, sustainbars I) 1), preferably rectangular in cross-section, the bar b havingits under surface toothed, and, in consequence, hereinafter designatedthe rack-bar.

The carriage A, carryin the spindle and hammer and their operatingmechanism and the mechanism for operating in connection with therack-bar for feeding the drill, and which several parts constitute thedrill proper, is composed of two side pieces, 0 c, and a transverseconnecting spindle-socket. o, and

said carriage is supported on the drill-frame by the bars I) I),engaging slideways c c on said carriage. By. this construction of theframe and the connection therewith of the carriage or drill proper thelatter may be freely placed upon and removed from the former, thuslargely simplifying the putting together of the parts and the operationof the drill. The drill is supported in working position by the usualstruts, d d,and couplings d, substantially as in the invention set forthin my Letters Patent for the same, numbered 302,424, dated July 22,1884, or in other approved manner admitting of the setting or adjustingof the drill to the work to be done. The hammer c has its hclve 0 set ina stock, 6, which is supported on a shaft, 0 borne between and in thelower ends of the carriage A,

and saidstock has a friction-roller, 0, Sup

ported between arms 6 of this stock, and said stock also has arms a,combined with springs 0 acting against abutments e of the carriage, allsubstantially as in mysaid invention. The hammer is oscillated by theengagement of the wipers or toes of the double cam f, mounted on theshaft f, borne by the carriage A, and the force of the blow may be.varied by increasing or diminishingthe leverage of the arms a withrespect to the springs, a plurality of. holes for the attachment of suchsprings being provided in said arms for this purpose, as shown. The camf also operates the spindle-retracting lever g, which is fulcrumed onapin, in the carriage A, said lever being forked at its upper end toengage the spindle.

The cam is rotated continuously in one di rection by means substantiallyas follows: h is a shaft borne by the carriage A, and having fast to itat'each end outside the carriage one half, h, of a clutch-box, fromwhich depends the arm h The other half, h, of the clutch box has asocket, h to receive the handle, and this half is held normally inengagement with the other by a spring, h Fig. 1, the halves of eachclutch-box being connected by teeth projecting from their meeting'facesin planes radial to the shaft h. The sockets for the handles are made asclutches, to permit the placing of the handles at the most con; venientangle for operating the machine under its location and conditions ofuse, and the socket parts It form convenient grips or hand-pieces foradjusting the angles the parts 72: shall have with respect to the partsh. At opposite ends of the shaft f are arranged boxes 1', the outer halfof each being broken away in Figs. 2 and 3 to expose the interiors, andthese boxes are duplicates, except to the extent of being rights andlefts. The top of the inner half of one box and the outer half of theother box have a toothed portion, 13, with which engage pinionsj onopposite ends of the shaft f, and the bottom of the outer half of onebox and the inner half of the other are likewise toothed, as at 2'',Figs. 4 and 10, and with this toothed portion of each box engage othersimilar pinions, 7", also on opposite ends of said shaft f. These boxes73 are connected by arms 6 with the arms h of the handlesocketclutch-boxes, and such connection may be variable, as by a plurality ofholes in the arms h, to adjust the length of throw of the boxes, if needbe. The pinions j j are connected to the shaft f by springdogs j jrespectively, (see Fig. 4,) having reverse engaging-points with theirrespective pinions, so that as the boxes are moved backward onepair ofthe pairs of pinions will be fast on the shaft f and cause its rotation,while the other pair will be loose and slip on said shaft, and on thereverse or forward motion the other and formerly loose pair of pinionswill be fast on said shaft and rotate itin the same direction as thefirst pair, while said first pair will be inoperative or idle withrespect to the shaft. The rolation of the pair of pinions fast on theshaft is effected in eachinst ance by the toothed portions of the boxesi engaging said pinions. The rectilinear reciprocations of the boxes orthe oscillations or rocking of the operating-handles are thus convertedinto a continuous rotary motion of the cam-shaft in one direction. Therotary motion of the cam-shaft f is transmitted by a sprocket-wheel, 7c,anda chain, k, to a sprocketwheel, on ashaft, Z. This shaft Z isarranged transversely of and in the carriage beneath the spindle-socket,and has (see Figs. 5 and 6) a worm, Z, which meshes with a wormwheel,,2, on the drill -spindle m. This wornrwheel is secured to the spindleloosely and yet to turn it by a spline, Z engaging a longitudinalgroove, m, in the spindle, said groove extending from near the head ofthe spindle to its rear end, and permitting the spindle to slide throughthe worm-gear in its longitudinal reciprocation. The wheel is ar-.ranged in a boxing, c of the spindle-socket, turns in it with thespindle, and is held by it as the spindle slides back and forth throughit. This worm and worm-wheel give to the spindle the rotation necessaryto present different points of the tool in the hole being drilled atdifferent places in such hole, and to effect its ready entrance andclearance of said hole. The drill-spindle is retracted by thelever 9engaging a shouldered nut, n, at its rear end, which nut confines aremovable strikingpin, and the spindle is projected by aspring, 0,coiled around it, all substantiall y as in the invention before referredto. 7

Instead of feeding the drill on its supports, as in said invention,Iherein employ .a worm, 10, Figs. 5, 6, and 7, suitably supported, asupon brackets, within the carriage A, which ,worm has a ratchet, p, anda pawl, 12', to engage it. This pawl engages the ratchet to give theworm a tooth-by-tooth rotation, and it is operated by a lever, g, onwhich it is mounted, and which lever is fulerumed, say, on theworm-shaft. This lever is jointed to a rod or bar, g, which in turn isswiveled to a ring,q secured on the spindle m, so as to reciprocate butnot rotate with said spindle. This worm engages a worm-wheel, r, on ashaft, r, at right angles thereto, said shaft being supported in andtransversely of the carriage A. This shaft 0" is shown provided with adetachable collar, r but the same may be made solid thereon, and theouter end thereof is adapted to be engaged by a sliding pinion, 8,receiving within it the inner end of the shaft r, and. having a gudgeonor journal, 8, which has a. bearing on the carriage A. This journal 8has two annular grooves, s s, to be engaged by a latch, t, to hold itin. and out of engagement with the collar r.

A simple mode for providing for the engagement of the collar r andpinion s is to make a squared or angular socket, W, in the face of thesaid collar and an aligned projection, sfi-on the pinion s. The pinionis engaged with or disengaged from the said collar by movement in alongitudinal. direction on the shaft r. rack-bar b, and when rotatedmoves the drill. progressively along the supporting frame.- Thismovement of the drill may be accomplished positively by disengaging thepinion 8 from the collar 1" or its worm-wheel This pinion meshes withthe r, and rotating said pinion bya crankhair dle applied to its journal8', and it may be had automatically by throwing the pinion intoengagement with the collar 1 or its wormwheel 1", in which latter casethe pinion will rotate with the said worm-whee1 and so feed the drillcommensurately with the progress of the boring. The provision of manualpositive movement of the drill on its frame is useful in setting oradjusting the drill initially, and for running it back to the rear endof the frame when it has reached the fore end of such frame, and forrunning the carriage on and off the frame. The several worms andwormwheels and the spring and that end of the spindle are protected fromdust and grit by a cap or shield, at, fast to the frame, and the boxes'5 subserve a like purpose for the gearing therein. The handles may beindependently adjusted, but their clutch members h being fast on theshaft 7:, said handles must be moved in unison to drive the machine.

The collar or swivel g is connected to move with the spindle in anysuitable manner,as by collars. i

I am aware that it is old to drive a drill by a springhammer and retractand partially revolve the same by bell-crank levers and suitableconnections, the hammer and levers being operated by wiper-cams. In sucha drill before the blow of the hammer and after the partial rotation thedrill is borne by a spring against the rock, and the rotating lever isconnected to a swinging pawl-plate, the pawl of which engages with aratcl1et-wl1eel concentric with the plate and feathered to thedrill-stock.

I am also aware that the motionconvcrting mechanism which I haveinterposed between the handles and camshaft is of itself older than myinvention; hence I claim it only as an element in my combination.

I do not broadly claim the combination ,with an advancing carriagecarrying a drillspindle and drill, a vibrating hammer and operatingmechanism therefor, of gearing connecting the hammer-operating shaftwith the drillspindle, consisting of a worm and worm-wheel, a gearwheel,and connectinggearing.

I disclaim the combination, in a rock-drilling machine, with acam-shaft, of clutches thereon composed of toothed members fixed to theshaft, and spring-pressed toothed mem bers to which theoperating-handles are socured,which spring-pressed members may engagethe fixed members so as to bring the handles to any desired angle to theperpendicular, and also a rock-drill frame composed of parallelguide-bars, upon which the drillcarriage moves, and which are connectedby yokes that are curved or bent so as not to interfere with the removalof the carriage.

What I claim is 1. A rockdrill having a cam and shaft therefor, a hammeroperated by said cam, a spindle projected into operative position by athe said cam, oscillating handles, and reciprocating gearing interposedbetween said han rotary motion of the cam-shaft, substantially asdescribed.

2. The combination, in arockdrill, of a spindle and an encirclingspring,a cam and shaft therefor, and connections for operating the hammer andspindle from said cam, with handles to which a back-andforth movement isgiven, and converting-gearing interposed between the handles andcam-shaft,andreciprocating with the handles to convert theirreciprocating motion intoa rotary motion of the cam-shaft, substantiallyas described.

3. The combination, in a rock-drill, of a spring-spindle, hammer,spindleretracting lever, a cam, and a cam-shaft, with pinions on saidshaft alternately fast and loose thereon. toothed racks engaging suchpinions, and oscillating handles connected with such racks toreciprocate them to causea continuous oneway rotary motion of thecam-shaft by means of the pinion then fast on it, substantially asdescribed.

4. In arock-drill, the drill-frame eonsistlng of parallel bars a a b andrack-bar 1), connected at their ends by a lower yoke, a, and an upperyoke, of, and the struts d d and couplings d, swiveled to bars a a,combined w1th the drill-carriage containing the drill-tool, hammer fordriving it, and means to rotate and reciprocate said drill-tool, and toautomatically feed the carriage forward in the frame, and ashifting-pinion adapted to be manually operated in connection with therack-bar to run the carriage on and off its frame, substantially asdescribed. 5. The combination, with a 'drill proper having areciprocating spindle, and a frame provided with a rack-bar, of ashifting gearwheel, its shaft having a squared end and a worm-wheel, apivoted latch engaging one of two grooves in the said shaft to lock itin either of two positions, and a worm engaging said worm-wheel andactuated by the spindle, whereby said gear-wheel may be rotated manuallyor automatically to feed the drill as required, substantially asdescribed.

6. The combin'ation,with a drill-framehaving the rack-bar b, of thedrill-carriage, the

drill-spindle therein, means, substantially as described, to reciprocateit, the shaft r, ar ranged transversely of the spindle in its carriage,and provided with the pinion s, engaging such rack bar, the worm-wheel ron said shaft, the worm 1), arranged in the carriage, the ratchet on theworm-shaft, the pawl to engage such ratchet, and the lever connectedwith the spindle and operated by its reciprocations to operate the pawlto turn the ratchet and thus rotate the worm, substantially as and forthe purpose described.

7. In a rockdrill, theframe composed of spring and retractedby a leveroperated by ICO the bars a a b and rack-bar b, and the eon- In testimonywhereof I'have hereunto set necting-yokes a a for said bars, and thedrillmy hand this 24th day of December, A. D.

carriage having the slideways c c to engage 1888. the bars b b, andcontaining the drill-tool,

5 hammer, and operating devices, combined A. INGRAM PARSONS.

with a shifting-pinion to engage said rack-bar free of thedrill-advancing mechanism, to per- Witnesses: mit the ready removal fromand insertion of W. E. BENJAMIN, the drill-carriage in its frame,substantially F. H. 000KB.

10 as described. A

